High-sealing electric clamping hand

Abstract

A high-sealing electric gripper comprises a mounting mechanism, a driving mechanism and a gripping mechanism, and the mounting mechanism comprises a shell, a front end cover, a rear end cover, a base and a waterproof connector, the front end cover and the rear end cover are fixed to the two ends of the shell in a sealed mode, the base is fixed to the front end cover, and the waterproof connector is fixed to the rear end cover in a sealed mode; the motor is fixed in the shell and electrically connected with the waterproof connector, the guide screw is in driving connection with an output shaft of the motor, the push rod is in threaded fit with the guide screw and penetrates through the front end cover and the base, the outer contour of the cross section of the portion, matched with the front end cover and / or the base, of the push rod is of a non-circular structure, and the push rod is in sealing fit with the front end cover and the base. The push rod is in limiting fit with the front end cover and the base in the rotating circumferential direction of the guide screw. The grabbing and clamping mechanism comprises two clamping heads and a driving plate which is located between the two clamping heads, is in sliding fit with the two clamping heads and is fixedly connected with the tail end of the push rod. The chuck is pivotally connected with the base and is provided with a guide through hole which forms an included angle with the length direction of the chuck; and a limiting pin penetrating through the guide through hole is arranged on the driving plate.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a high-sealing electric clamp. Background Technology

[0002] In the use of CNC engraving machines or CNC (Computer Numerical Control) machine tools, to save labor costs, it is often necessary to use automatic clamping devices to automatically clamp cylindrical materials for loading and unloading operations, or to automatically clamp new tools for replacement after grinding heads, drill bits, milling cutters, etc., have exceeded a fixed number of uses. Currently, the automatic clamping devices used in CNC engraving machines or CNC machines in the industry include a base, a cylinder fixed on the base, and a push rod connected to the end of the cylinder and extending and retracting synchronously with the cylinder's telescopic rod. One end of the push rod is placed in a guide sleeve, and the other end of the push rod is connected to a drive plate. A chuck is rotatably connected to each side of the drive plate, and the two chucks are also hinged to the base. When the cylinder is activated, the chucks open and close like scissors, thereby clamping the workpiece or tool to achieve workpiece or tool gripping. However, for the aforementioned automatic clamping devices, since the cylinders use compressed gas as power, the air pressure is difficult to control. Unstable air pressure will affect the clamping force and the opening and closing speed of the chuck. Furthermore, excessively low air pressure poses a risk of the product falling, while excessively high air pressure can damage workpieces made of special materials. Additionally, in CNC engraving machines or CNC machining systems where cutting fluid is required, the cylinder body is susceptible to the effects of oil and water, which can damage the internal piston and shorten the cylinder's lifespan. This necessitates frequent maintenance and parts replacement, which, in the long run, increases the operating and maintenance costs of the automatic clamping device. Utility Model Content

[0003] Therefore, it is necessary to address the above-mentioned shortcomings by providing a high-sealing electric gripper with precise controllable clamping force, good sealing performance, and long service life.

[0004] A high-sealing electric gripper, comprising:

[0005] The installation mechanism includes a housing, a front cover fixed to one end of the housing and sealed to the housing, a rear cover fixed to the other end of the housing and sealed to the housing, a base located on the side of the front cover facing away from the housing and fixedly connected to the front cover, and a waterproof connector located on the side of the rear cover facing away from the housing and fixedly connected to the rear cover. The waterproof connector is sealed to the rear cover and electrically connected to an external power source.

[0006] A drive mechanism, comprising a motor housed within the inner cavity of a housing and electrically connected to a waterproof connector; a guide screw driven and coaxially rotating with the output shaft of the motor; and a push rod threadedly engaged with the guide screw and passing through a front end cover and a base. The motor is fixedly connected to the inner wall of the housing. The outer contour of the cross-section of the push rod's mating portion with the front end cover and / or the base is non-circular. The push rod is sealed to both the front end cover and the base, and is also limited in position to both the front end cover and the base along the circumferential direction of the guide screw's rotation.

[0007] The gripping mechanism includes two grippers disposed opposite each other on the side of the base facing away from the front end cover, and a drive plate located between the two grippers and slidably engaged with each of the two grippers; one end of the gripper adjacent to the base is pivotally connected to the base, and a guide hole is provided on the gripper at an angle to the length direction of the gripper; the drive plate is fixedly connected to the end of the push rod, and the drive plate is provided with two limiting pins passing through the guide hole and correspondingly limiting the two grippers, the limiting pins being able to slide within the guide hole along the length direction of the guide hole;

[0008] The push rod moves along the length of the guide screw when the motor drives the guide screw to rotate, so as to pull or push the drive plate closer to or away from the base, so that the two clamps open and close to grip the object.

[0009] In one embodiment, the inner cavity of the housing is provided with a partition, a drive chamber is formed between the partition and the rear end cover, and a transmission chamber is formed between the partition and the front end cover. A first through hole is provided on the partition to connect the drive chamber and the transmission chamber. The motor is housed in the drive chamber and fixedly connected to the inner wall of the housing, and the output shaft of the motor passes through the first through hole and is inserted into the transmission chamber. The guide screw is housed in the transmission chamber and is drivenly connected to the output shaft of the motor through a coupling. One end of the push rod is located in the transmission chamber and is threadedly engaged with the guide screw, and the other end of the push rod extends out of the transmission chamber.

[0010] In one embodiment, the rear end cover has a second through hole communicating with the drive chamber. The waterproof connector is inserted into the second through hole and is fixedly connected to and sealed with the second through hole. The waterproof connector is electrically connected to the motor through a wire or wiring pin passing through the second through hole.

[0011] In one embodiment, a limiting groove is formed at one end of the front end cover located in the transmission chamber, and a third through hole communicating with the limiting groove is formed at the other end of the front end cover facing away from the transmission chamber. The diameter of the third through hole is smaller than the inner diameter of the limiting groove or the minimum width within the limiting groove. A fourth through hole communicating with the third through hole and the external environment is formed on the base. The push rod includes a connecting part housed in the limiting groove and a driving part fixedly connected to the connecting part and passing through the third through hole and the fourth through hole in sequence. The diameter of the driving part is smaller than the diameter of the connecting part or the minimum width on the connecting part. A threaded groove extending along the length direction of the guide screw is formed on the connecting part. The guide screw is inserted into the threaded groove and threadedly connected to the inner surface of the threaded groove. The driving part is sealed to the base and the front end cover.

[0012] In one embodiment, at least one flat key is fixed on the outer surface of the connecting part, and at least one slot corresponding to the flat key is opened in the limiting groove. The flat key is embedded in the slot and engages with the inner wall of the slot.

[0013] In one embodiment, the inner wall of the third through hole is provided with a first groove, and the first groove is provided with a first sealing ring that elastically abuts against the inner wall of the first groove, the base and the driving part, and a first support ring that fits against the inner wall of the first groove and the driving part.

[0014] In one embodiment, a second groove is provided on the outer ring side of the end of the rear cover that is inserted into the outer shell. The second groove contains a second sealing ring that elastically abuts against the inner wall of the second groove and the inner wall of the outer shell, and a second support ring that fits against the inner wall of the second groove and the inner wall of the outer shell, respectively. The base is screwed to the front cover. A third groove is provided on the outer ring side of the end of the front cover that is inserted into the outer shell. The third groove contains a third sealing ring that elastically abuts against the inner wall of the third groove and the inner wall of the outer shell, and a third support ring that fits against the inner wall of the third groove and the inner wall of the outer shell, respectively.

[0015] In one embodiment, the drive plate is located on one side of the chuck, the limiting pin passes through the guide hole and is fixedly connected to the drive plate, and the end of the limiting pin is fitted with a limiting member that fits against the other side of the chuck; a clamping part is provided on the side of the chuck adjacent to the drive plate.

[0016] In one embodiment, the motor is a brushless motor.

[0017] In one embodiment, the motor is a micro motor.

[0018] The high-sealing electric gripper of this invention is driven by a motor to rotate a guide screw. Further, through the threaded engagement between the guide screw and the push rod, the push rod moves along the length of the guide screw, thereby opening and closing the two grippers. By controlling the motor current, the opening and closing speed of the grippers and the clamping force on the object can be precisely controlled, improving the reliability of object clamping and preventing damage to the object. Multiple seals at the connection points between the outer shell and other components enhance the sealing performance of the electric gripper, preventing oil and water from entering the inner cavity of the outer shell and extending the service life of the electric gripper. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the high-sealing electric gripper in one embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional structural diagram of a high-sealing electric gripper in one embodiment of the present invention;

[0021] Figure 3 This is an exploded structural diagram of a high-sealing electric gripper in one embodiment of the present invention. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] Please combine Figure 1-3This utility model discloses a high-sealing electric gripper with precise controllable clamping force, good sealing performance, and long service life. The high-sealing electric gripper includes a mounting mechanism 100, a drive mechanism 200, and a gripping mechanism 300. The mounting mechanism 100 includes a housing 110, a front cover 120 fixed to one end of the housing 110 and sealingly fitted thereto, a rear cover 130 fixed to the other end of the housing 110 and sealingly fitted thereto, a base 140 located on the side of the front cover 120 facing away from the housing 110 and fixedly connected to the front cover 120, and a waterproof connector 150 located on the side of the rear cover 130 facing away from the housing 110 and fixedly connected to the rear cover 130. The waterproof connector 150 is sealed to the rear cover 130 and electrically connected to an external power source. By sealing both ends of the housing 110 with the front cover 120 and the rear cover 130, a sealed cavity is formed inside the housing 110 to prevent external oil and water from entering the inner cavity of the housing 110. The drive mechanism 200 includes a motor 210 housed in the inner cavity of the housing 110 and electrically connected to the waterproof connector 150, a guide screw 220 drivenly connected to the output shaft of the motor 210 and rotating coaxially with the output shaft of the motor 210, and a push rod 230 threadedly engaged with the guide screw 220 and passing through the front end cover 120 and the base 140. The motor 210 is fixedly connected to the inner wall of the housing 110. The outer contour of the cross section of the push rod 230 that mates with the front end cover 120 and / or the base 140 is a non-circular structure. The push rod 230 is sealed to the front end cover 120 and the base 140 respectively, and the push rod 230 is limited to the front end cover 120 and the base 140 in the circumferential direction of rotation of the guide screw 220 respectively. In this embodiment, the outer contour of the cross-section of the part of the push rod 230 that mates with the front cover 120 and / or the base 140 is designed as a non-circular structure. The push rod 230 is limited to the front cover 120 and the base 140 in the circumferential direction of the rotation of the guide screw 220, respectively. This prevents the push rod 230 from rotating synchronously with the guide screw 220 when the guide screw 220 rotates. That is, the non-circular structure and the limited engagement between the push rod 230 and the front cover 120 and the base 140 are used to limit the rotation of the push rod 230. When the guide screw 220 rotates under the drive of the motor 210, the push rod 230 moves along the length direction of the guide screw 220 through the threaded engagement between the guide screw 220 and the push rod 230, so that the end of the push rod 230 can extend or retract into the housing 110.The gripping mechanism 300 includes two grippers 310 disposed opposite to each other on the side of the base 140 facing away from the front end cover 120, and a drive plate 320 located between the two grippers 310 and slidably engaged with each of the two grippers 310; one end of the gripper 310 adjacent to the base 140 is pivotally connected to the base 140, and a guide hole 311 is provided on the gripper 310 at an angle to the length direction of the gripper 310; the drive plate 320 is fixedly connected to the end of the push rod 230, and the drive plate 320 is provided with two limiting pins 330 passing through the guide hole 311 and correspondingly limiting the two grippers 310, and the limiting pins 330 can slide within the guide hole 311 along the length direction of the guide hole 311. When the motor 210 drives the guide screw 220 to rotate, the push rod 230 moves along the length of the guide screw 220 to pull or push the drive plate 320 closer to or away from the base 140, so that the two clamps 310 open and close to grip the object.

[0024] In this embodiment, the base 140 provides a mounting portion and a support portion for the chuck 310. While pivotally connecting the chuck 310 to the base 140, making the pivot connection portion of the chuck 310 and the base 140 the rotation center of the chuck 310, a guide through hole 311 is formed on the chuck 310 at an angle to its length direction. The distance between the two chucks 310 is limited by the drive plate 320. When the motor 210 operates, the output shaft of the motor 210 drives the guide screw 220 to rotate. Since the guide screw 220 is threadedly connected to the push rod 230, and the rotation of the push rod 230 is restricted, the push rod... 230 will move along the length of the guide screw 220, and then the end of the push rod 230 will drive the drive plate 320 to move closer to or away from the base 140. During the process of the drive plate 320 moving closer to or away from the base 140, the limiting pin 330 on the drive plate 320 will slide along the guide through hole 311 of the chuck 310, thereby applying a deflection force to the chuck 310, causing the chuck 310 to rotate around the pivot connection between the chuck 310 and the base 140. In this way, the ends of the two chucks 310 move closer to or further away from each other, thereby realizing the opening and closing of the gripping mechanism 300 so as to grip or put down objects.

[0025] The aforementioned high-sealing electric gripper is driven by a motor 210 to rotate a guide screw 220. Further, through the threaded engagement between the guide screw 220 and the push rod 230, the push rod 230 moves along the length of the guide screw 220, thereby opening and closing the two grippers 310. By controlling the current of the motor 210, the opening and closing speed of the grippers 310 and the clamping force of the grippers 310 on the object can be precisely controlled, improving the reliability of object clamping and preventing damage to the object. Multiple seals at the connection points between the outer shell 110 and other components improve the sealing performance of the electric gripper, preventing oil and water from entering the inner cavity of the outer shell 110 and extending the service life of the electric gripper.

[0026] In this embodiment, the outer shell 110 has a cylindrical structure. The outer contours of the front cover 120 and the rear cover 130 are both T-shaped. The front cover 120 is inserted into the inner cavity of the outer shell 110 and abuts against the inner wall and one end face of the outer shell 110, respectively. The rear cover 130 is inserted into the inner cavity of the outer shell 110 and abuts against the inner wall and the other end face of the outer shell 110, respectively. By designing the front cover 120 and the rear cover 130 as T-shaped structures, the insertion depth of the front cover 120 and the rear cover 130 into the outer shell 110 can be limited, thus avoiding the problem of the front cover 120 and the rear cover 130 easily falling off due to the shallow insertion depth. At the same time, it is convenient to remove the front cover 120 and the rear cover 130 from the outer shell 110 during the electric gripper disassembly process.

[0027] The inner cavity of the outer casing 110 is provided with a partition 160. A drive chamber 111 is formed between the partition 160 and the rear end cover 130, and a transmission chamber 112 is formed between the partition 160 and the front end cover 120. A first through hole 161 is provided on the partition 160 to connect the drive chamber 111 and the transmission chamber 112. The first through hole 161 is used to provide a connection channel between the motor 210 and the guide screw 220. In one embodiment, the motor 210 is a brushless motor. In another embodiment, the motor 210 is a micro motor. The motor 210 is housed in the drive chamber 111 and fixedly connected to the inner wall of the outer casing 110, and the output shaft of the motor 210 passes through the first through hole 161 and is inserted into the transmission chamber 112. Preferably, the motor 210 is fixed to the partition 160 with screws. The motor 210 has a cylindrical structure, and its diameter is equal to the inner diameter of the drive chamber 111. Thus, when the motor 210 is installed in the drive chamber 111, it is fixed to the partition 160 while conforming to the inner wall of the drive chamber 111, preventing the motor 210 from shaking within the outer casing 110. Furthermore, in this embodiment, the motor 210 is also equipped with a driver that controls the current of the motor 210. By controlling the current of the motor 210 through this driver, the output power of the motor 210 and the rotational speed of the motor 210 output shaft can be controlled, thereby controlling the opening and closing speed and angle of the chuck 310, and thus controlling the clamping force between the chuck 310 and the object. The guide screw 220 is housed within the transmission chamber 112 and driven by the output shaft of the motor 210 via a coupling 240. One end of the push rod 230 is located within the transmission chamber 112 and threadedly engaged with the guide screw 220, while the other end extends out of the transmission chamber 112. In this embodiment, both ends of the coupling 240 are respectively sleeved on the guide screw 220 and the output shaft of the motor 210. Pins 241 are inserted into the sleeved portions of the coupling 240 and the guide screw 220, as well as the sleeved portions of the coupling 240 and the motor 210 output shaft, to prevent the guide screw 220 from rotating relative to the motor 210 output shaft. This ensures the reliability of the motor 210's drive on the guide screw 220 and the accuracy of the clamping force controlled by the motor 210 on the chuck 310.

[0028] In one embodiment, the rear end cover 130 has a second through hole 131 communicating with the drive chamber 111. A waterproof connector 150 is inserted into the second through hole 131 and is fixedly connected to and sealed with the second through hole 131. The waterproof connector 150 is electrically connected to the motor 210 through a wire or wiring pin passing through the second through hole 131. In this embodiment, the waterproof connector 150 is used as an adapter for connecting the motor 210 to an external power source. A portion of the waterproof connector 150 is inserted into the second through hole 131 and sealed with the inner wall of the second through hole 131, while the other portion of the waterproof connector 150 is located outside the second through hole 131 and abuts against the end face of the rear end cover 130. To improve the stability of the connection between the waterproof connector 150 and the rear end cover 130, in this embodiment, the mounting mechanism 100 further includes a sealing screw 170 that passes through the rear end cover 130 and is inserted into the waterproof connector 150, and the waterproof connector 150 is interference-fitted with the inner wall of the second through hole 131. Thus, through the interference fit between the waterproof connector 150 and the second through hole 131 and the screw connection between the waterproof connector 150 and the rear end cover 130, a dual connection between the waterproof connector 150 and the rear end cover 130 is achieved, thereby improving the stability of the connection between the two.

[0029] In one embodiment, a limiting groove 121 is formed at one end of the front cover 120 located inside the transmission chamber 112, and a third through hole 122 communicating with the limiting groove 121 is formed at the other end of the front cover 120 facing away from the transmission chamber 112. The diameter of the third through hole 122 is smaller than the inner diameter of the limiting groove 121 or the minimum width within the limiting groove 121. It can be understood that the limiting groove 121 and the third through hole 122 together form a stepped hole passing through both ends of the front cover 120. A fourth through hole 141 communicating with the third through hole 122 and the external environment is formed on the base 140. The limiting groove 121, the third through hole 122, and the fourth through hole 141 together provide a passage for the push rod 230. The push rod 230 includes a connecting portion housed within a limiting groove 121 and a driving portion fixedly connected to the connecting portion and sequentially passing through a third through hole 122 and a fourth through hole 141. The diameter of the driving portion is smaller than the diameter of the connecting portion or the minimum width on the connecting portion. Alternatively, the connecting portion can be understood as the large-diameter portion of the push rod 230, and the driving portion as the small-diameter portion of the push rod 230. A threaded groove 231 extending along the length of the guide screw 220 is provided on the connecting portion. The guide screw 220 is inserted into the threaded groove 231 and threadedly connected to the inner surface of the threaded groove 231. The driving portion is sealed to the base 140 and the front end cover 120. Thus, during the rotation of the guide screw 220 relative to the push rod 230, the external thread on the guide screw 220 engages with the internal thread on the inner surface of the threaded groove 231. Simultaneously, due to the rotational restriction on the push rod 230, the push rod 230 moves along the length of the guide screw 220. By creating a limiting groove 121 on the front end cover 120, the maximum distance the push rod 230 can move away from the rear end cover 130 is limited, thereby reducing the impact of the inner wall of the guide through hole 311 on the limiting pin 330 and extending the service life of the limiting pin 330. Additionally, in this embodiment, the thread length of the guide screw 220 limits the maximum distance the push rod 230 can move towards the rear end cover 130, thus avoiding damage to the object caused by excessive clamping force of the chuck 310. Of course, in this embodiment, the depth of the limiting groove 121 and the thread length of the guide screw 220 limit the maximum opening and closing position of the chuck 310. The actual opening and closing size of the chuck 310 is precisely controlled by the current of the motor 210, which will not be elaborated further here.

[0030] In one embodiment, the outer contour of the connecting portion's cross-section is non-circular, and the inner contour shape of the limiting groove 121 is adapted to the outer contour shape of the connecting portion. Further, at least one flat key 232 is fixed to the outer surface of the connecting portion, and at least one slot corresponding to the flat key is formed within the limiting groove 121. The flat key is embedded in the slot and engages with the inner wall of the slot to restrict the rotation of the push rod 230. In another embodiment, the outer contour of the connecting portion's cross-section is non-circular, and the inner contour shape of the limiting groove 121 is adapted to the outer contour shape of the connecting portion to restrict the rotation of the push rod 230. In yet another embodiment, the cross-section of the driving portion is non-circular, and the third through hole 122 and / or the fourth through hole 141 are non-circular holes adapted to the outer contour shape of the driving portion to restrict the rotation of the push rod 230.

[0031] To achieve a sealed connection between the push rod 230 and the front end cover 120 and the base 140, a first groove 123 is provided on the inner wall of the third through hole 122. The first groove 123 contains a first sealing ring 124 that elastically abuts against the inner wall of the first groove 123, the base 140, and the drive unit, and a first support ring 125 that fits against the inner wall of the first groove 123 and the drive unit. In this embodiment, the first sealing ring 124 is made of nitrile rubber or fluororubber and is used to achieve a sealed fit between the push rod 230 and the base 140 and the front end cover 120, preventing external oil and water from entering the inner cavity of the housing 110 through the connection between the push rod 230 and the base 140 or the connection between the push rod 230 and the front end cover 120, thereby achieving sealed protection for the guide screw 220 and the motor 210. The first support ring 125 is used to provide support for the push rod 230 by the front cover 120, so as to reduce the deformation of the push rod 230 when subjected to external force, thereby ensuring the sealing effect of the first sealing ring 124 on the connection between the push rod 230 and the base 140 and the front cover 120.

[0032] In one embodiment, a second groove 132 is provided on the outer ring side of the end of the rear cover 130 that is inserted into the outer shell 110. A second sealing ring 133 is provided in the second groove 132 that elastically abuts against the inner wall of the second groove 132 and the inner wall of the outer shell 110, and a second support ring 134 that fits against the inner wall of the second groove 132 and the inner wall of the outer shell 110, respectively. The base 140 is screwed to the front cover 120. A third groove 126 is provided on the outer ring side of the end of the front cover 120 that is inserted into the outer shell 110. A third sealing ring 127 that elastically abuts against the inner wall of the third groove 126 and the inner wall of the outer shell 110, respectively, and a third support ring 128 that fits against the inner wall of the third groove 126 and the inner wall of the outer shell 110, respectively. In this embodiment, both the second sealing ring 133 and the third sealing ring 127 are made of nitrile rubber or fluororubber to respectively achieve sealing protection at the connection between the rear end cover 130 and the outer shell 110 and the connection between the front end cover 120 and the outer shell 110, preventing external oil and water from entering the inner cavity of the outer shell 110 through the rear end cover 130 or the front end cover 120. Both the second support ring 134 and the third support ring 128 are used to provide support force for the outer shell 110, reducing the deformation of the outer shell 110 at the locations where the second sealing ring 133 and the third sealing ring 127 are installed due to external forces, thereby ensuring the sealing effect of the second sealing ring 133 and the third sealing ring 127.

[0033] In this embodiment, the drive plate 320 is located on one side of the chuck 310, and the limiting pin 330 passes through the guide hole 311 and is fixedly connected to the drive plate 320. The end of the limiting pin 330 is fitted with a limiting member 340 that fits against the other side of the chuck 310. In one embodiment, each end of the limiting pin 330 is fitted with a limiting member 340, and the two limiting members 340 are limiting rings threadedly connected to the limiting pins 330. In another embodiment, the limiting member 340 is a limiting plate located on the other side of the chuck 310, and the two limiting pins 330 pass through the limiting plate and are fixedly connected to it. Additionally, it should be noted that in this embodiment, the guide hole 311 includes a first end adjacent to the base 140 and a second end facing away from the base 140. The second end can be deflected in a direction close to the axis of the push rod 230 or in a direction away from the axis of the push rod 230. When the second end is deflected in a direction close to the axis of the push rod 230, when the push rod 230 drives the drive plate 320 to move towards the base 140, the two clamps 310 move closer to each other to clamp the object. When the second end is deflected in a direction away from the axis of the push rod 230, when the push rod 230 drives the drive plate 320 to move away from the base 140, the two clamps 310 move closer to each other to clamp the object. Furthermore, a clamping portion is provided on the side of the chuck 310 adjacent to the drive plate 320. This clamping portion has a notch 312 that conforms to the outer contour of the object to be clamped. Thus, when an object is clamped by both chucks 310, the outer surface of the object fits against the inner surface of the notch 312, increasing the contact area between the object and the chucks 310, improving clamping stability, and reducing scratches on the object's surface. Preferably, the clamping portion has multiple notches 312 of different sizes arranged side-by-side. The shapes of the notches 312 can be the same or different to accommodate objects of different sizes and shapes.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-sealing electric gripper, characterized in that, include: The installation mechanism includes a housing, a front cover fixed to one end of the housing and sealed to the housing, a rear cover fixed to the other end of the housing and sealed to the housing, a base located on the side of the front cover facing away from the housing and fixedly connected to the front cover, and a waterproof connector located on the side of the rear cover facing away from the housing and fixedly connected to the rear cover. The waterproof connector is sealed to the rear cover and electrically connected to an external power source. A drive mechanism, comprising a motor housed within the inner cavity of a housing and electrically connected to a waterproof connector; a guide screw driven and coaxially rotating with the output shaft of the motor; and a push rod threadedly engaged with the guide screw and passing through a front end cover and a base. The motor is fixedly connected to the inner wall of the housing. The outer contour of the cross-section of the push rod's mating portion with the front end cover and / or the base is non-circular. The push rod is sealed to both the front end cover and the base, and is also limited in position to both the front end cover and the base along the circumferential direction of the guide screw's rotation. The gripping mechanism includes two grippers disposed opposite each other on the side of the base facing away from the front end cover, and a drive plate located between the two grippers and slidably engaged with each of the two grippers; one end of the gripper adjacent to the base is pivotally connected to the base, and a guide hole is provided on the gripper at an angle to the length direction of the gripper; the drive plate is fixedly connected to the end of the push rod, and the drive plate is provided with two limiting pins passing through the guide hole and correspondingly limiting the two grippers, the limiting pins being able to slide within the guide hole along the length direction of the guide hole; The push rod moves along the length of the guide screw when the motor drives the guide screw to rotate, so as to pull or push the drive plate closer to or away from the base, so that the two clamps open and close to grip the object.

2. The high-sealing electric gripper according to claim 1, characterized in that, The inner cavity of the outer shell is provided with a partition, and a drive chamber is formed between the partition and the rear end cover, and a transmission chamber is formed between the partition and the front end cover. A first through hole is provided on the partition to connect the drive chamber and the transmission chamber. The motor is housed in the drive chamber and fixedly connected to the inner wall of the outer shell, and the output shaft of the motor passes through the first through hole and is inserted into the transmission chamber. The guide screw is housed in the transmission chamber and is drivenly connected to the output shaft of the motor through a coupling. One end of the push rod is located in the transmission chamber and is threadedly engaged with the guide screw, and the other end of the push rod extends out of the transmission chamber.

3. The high-sealing electric gripper according to claim 2, characterized in that, The rear end cover has a second through hole that communicates with the drive chamber. The waterproof connector is inserted into the second through hole and is fixedly connected to and sealed with the second through hole. The waterproof connector is electrically connected to the motor through a wire or wiring pin that passes through the second through hole.

4. The high-sealing electric gripper according to claim 2, characterized in that, The front end cover has a limiting groove at one end located inside the transmission chamber, and a third through hole communicating with the limiting groove at the other end of the front end cover facing away from the transmission chamber. The diameter of the third through hole is smaller than the inner diameter of the limiting groove or the minimum width inside the limiting groove. A fourth through hole communicating with the third through hole and the external environment is provided on the base. The push rod includes a connecting part housed in the limiting groove and a driving part fixedly connected to the connecting part and passing through the third through hole and the fourth through hole in sequence. The diameter of the driving part is smaller than the diameter of the connecting part or the minimum width on the connecting part. A threaded groove extending along the length direction of the guide screw is provided on the connecting part. The guide screw is inserted into the threaded groove and threadedly connected to the inner surface of the threaded groove. The driving part is sealed to the base and the front end cover.

5. The high-sealing electric gripper according to claim 4, characterized in that, At least one flat key is fixed on the outer surface of the connecting part, and at least one slot corresponding to the flat key is opened in the limiting groove. The flat key is embedded in the slot and has a concave-convex fit with the inner wall of the slot.

6. The high-sealing electric gripper according to claim 4, characterized in that, The inner wall of the third through hole is provided with a first groove, and the first groove is provided with a first sealing ring that elastically abuts against the inner wall of the first groove, the base and the driving part, and a first support ring that fits against the inner wall of the first groove and the driving part.

7. The high-sealing electric gripper according to claim 1, characterized in that, The outer ring side of the end of the rear cover that is inserted into the outer shell has a second groove. The second groove contains a second sealing ring that elastically abuts against the inner wall of the second groove and the inner wall of the outer shell, and a second support ring that fits against the inner wall of the second groove and the inner wall of the outer shell, respectively. The base is screwed to the front cover. The outer ring side of the end of the front cover that is inserted into the outer shell has a third groove. The third groove contains a third sealing ring that elastically abuts against the inner wall of the third groove and the inner wall of the outer shell, and a third support ring that fits against the inner wall of the third groove and the inner wall of the outer shell, respectively.

8. The high-sealing electric gripper according to claim 1, characterized in that, The drive plate is located on one side of the chuck, the limiting pin passes through the guide hole and is fixedly connected to the drive plate, and the end of the limiting pin is fitted with a limiting member that fits against the other side of the chuck; a clamping part is provided on the side of the chuck adjacent to the drive plate.

9. The high-sealing electric gripper according to claim 1, characterized in that, The motor is a brushless motor.

10. The high-sealing electric gripper according to claim 1, characterized in that, The motor is a miniature motor.

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